CI: use ubuntu 22.04

Author: ThomasWaldmann

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ on:
 jobs:
   lint:
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     timeout-minutes: 10
 
     steps:
@@ -46,16 +46,16 @@ jobs:
     strategy:
       matrix:
         include:
-            - os: ubuntu-20.04
+            - os: ubuntu-22.04
               python-version: '3.8'
               toxenv: py38
-            - os: ubuntu-20.04
+            - os: ubuntu-22.04
               python-version: '3.9'
               toxenv: py39
-            - os: ubuntu-20.04
+            - os: ubuntu-22.04
               python-version: '3.10'
               toxenv: py310
-            - os: ubuntu-20.04
+            - os: ubuntu-22.04
               python-version: '3.11'
               toxenv: py311